Letter Sudoku for Kids – printable PDF worksheets
Each PDF has 6 puzzles on A4 paper and the answers at the end – just tap, download and print.
Sudoku with letters instead of numbers
In a letter sudoku, the squares hold capital letters: A, B, C and D in the 4×4, A to F in the 6×6 and A to I in the 9×9. The 9×9 is available online; the printable worksheets come in 4×4 and 6×6. The rule is the same as in a number sudoku: each letter appears exactly once in every row, every column and every box.
Nobody needs to be able to read for this. It’s enough to recognize the letters and tell them apart. On the worksheets they are printed in a plain, simple font.
Why it suits kids who are learning letters
- Looking closely: children compare letter shapes again and again – including similar ones like E and F.
- Writing along the way: on paper, the child writes each missing letter into the square.
- Saying them out loud: “This row is still missing a C” – a simple way to practice letter names.
- Same logic as picture sudoku: kids who know the picture sudoku don’t need to learn anything new – only the symbols change.
Ideas for home and the classroom
- Find a word: after solving, think of a word for each letter – A for apple, B for ball, C for cat.
- 4×4 first, then 6×6: start with A to D. When E and F join in, the grid gets bigger.
- Starting school: for picture puzzles with backpacks and pencils, try the back-to-school sudoku; age tips are in sudoku for 6-year-olds.
Frequently asked questions
What age is letter sudoku for?
As soon as a child can reliably tell the letters A to D apart – often around the time they start school.
Does my child need to be able to read?
No. The letters are only recognized and compared, not read.
Are there lowercase letters?
No, at the moment letter sudoku uses capital letters only.
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